Intense blue-emitting Ca_2PO_4Cl:Eu^(2+) phosphor for near-ultraviolet converting white light-emitting diodes

作     者：Yi-Chen Chiu Chun-Kuei Chang Yao-Tsung Yeh Shyue-Ming Jang 

作者机构：Material and Chemical Research LaboratoriesIndustrial Technology Research Institute Phosphors Research Laboratory and Department of Applied ChemistryNational Chiao Tung University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2010年第28卷第S1期

页      面：250-253页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by Industrial Technology Research Institute under contract (9301XS1J31) the National Science Council of Taiwan under Contract (NSC98-2113-M-009-005-MY3) (T.-M.C.) 

主　　题：Ca2PO4Cl:Eu2+ phosphors luminscense rare earths 

摘      要：A blue phosphor Ca2PO4Cl:Eu2+(CAP:Eu2+) was synthesized by solid state *** Ca2PO4Cl:Eu2+ exhibited high quantum efficiency and excellent thermal *** luminescent intensity of Ca2PO4Cl:Eu2+ was found to be 128% under excitation at 380 nm,149% under 400 nm,and 247% under 420 nm as high as that of BaMgAl10O17:Eu2+.The optimal doping concentration was observed to 11 mol.% of CAP:Eu2+.The energy transfer between Eu2+ ions in CAP were occurred via electric multipolar interaction,and the critical transfer distance was estimated to be 1.26 nm.A mixture of blue-emitting Ca2PO4Cl:Eu2+,green-emitting(Ba,Sr)2SiO4:Eu2+ and red-emitting CaAlSiN3:Eu2+ phosphors were selected in conjunction with 400 nm chip to fabricate white LED *** average color-rendering index Ra and correlated color temperature(Tc) of the white LEDs were found to be 93.4 and 4590 K,*** results indicated that it was a promising candidate as a blue-emitting phosphor for the near-UV white light-emitting diodes.